3517 Parameter Set Transfer Modes (PX-310)17.1 Communication Modes17.1.1 One-way and HandshakeParameter Sets can be transferred by bulk dump using the message exchange types described below.• One-way mode Parameter Set send/receive (not used)• One-way mode Parameter Set send request send/receive (not used)• Handshake mode Parameter Set send/receive• Handshake mode Parameter Set send request, receive rejected, error notification send/receiveWith the one-way mode, the sending device sends data and ends the session without regard to the response of thereceiving device. This mode is best for one-way transfers from a sequencer or similar device.Important!The one-way mode format is defined for possible future use, but it is not used because there is no Parameter Setcategory that corresponds to this Instrument.With the handshake mode, the sending device sends the data and then waits for a response from the receivingdevice before advancing to the next session. This is a high-speed mode in which there is no time wasted waiting.See "VI Parameter Set List" for information about how Parameter Sets are actually allocated.In order to ensure maximum speed for bulk dumping of Parameter Sets, the data format is different from the dataformat used for Individual Parameter Change. Data is transferred as-is, using the Model's memory image.17.1.2 Session and SubsessionSubsessionOne Parameter Set can be transferred per subsession. Subsession transfers one Parameter Set or data that is brokendown into multiple packets for transfer, with EOD (End of data) sent at the end to terminate the send.Data is broken down into multiple packets when a single Parameter Set is larger than a certain size. The PacketNumber in the packet's index field is used to indicate the sequential position of a packet relative to the otherpackets.Even if Parameter Sets are small, they cannot be grouped together and sent as a single packet. A Parameter Setdelimiter is always treated as a packet delimiter for transfer.SessionOne Parameter Set or multiple Parameter Sets can be transferred by one session. A session can consist of onesubsession or multiple subsessions, with EOS (End of session) sent at the end to terminate the send.Regardless of whether there is a single Parameter Set or multiple Parameter sets, an actual bulk dump always takesthe form of a session, never a subsession only.